记忆加压接骨器在肱骨骨折治疗中的生物力学分析

目的 分析接骨器对于肱骨骨折的愈合提供的应力环境，分析接骨器在骨折愈合过程中的应力遮挡效应，同时应用骨重建理论分析接骨器加压支提供的应力环境对于骨折愈合的影响。方法 运用三维有限单元法，对新型记忆加压接骨器以及肱骨分别进行三维有限元计算。结果 肱骨骨折段始终处于三向压应力状态，剪应力不会引起骨内部的剪切破坏，同时接骨器固定后肱骨产生的变形很小。接骨器在环抱支的腕部产生大的弯矩，产生的应力较大。结论 加压支提供的持续压应力使接骨器产生的应力遮挡效应消失，肱骨的压应力刺激在骨折愈合过程中不断得到改善。

BiomechanicsAnalysisofCatagmaticHumerusFixedwithMemory-Compressive-Connector

Objective This study is designed to analysis circumstance that connector provdes for humerus,to analysis stress interfere when the connector is applied to humerus cure,and fo analysis stress enviroment according to bone-remodeling. Methods Three dimensional finite element methods is applied to calculats three-dimensional-finite-element model of humerus and connector. Resuls The section of catagmatic humerus always gets three dimensional stress.Shear stress cannot lead destruction of humerus.The bone produces very little distortion.Connector has four sections in which the strain reachs higher value. Conclusion Because of providing continuing stress,connector cannot bring interfere for loads.This improves stress activation for humerus.